Printing press roll shifting means



May 28, 1935. H. H. RAWSON 2,002,584

PRINTING PRESS ROLL SHIFTING MEANS Filed Nov. 17, 193

gmwwtom Patented May 28, 1935 UNITED STATES PATENT OFFICE 2,002,584PRINTING PRESS ROLL SHIFTING MEANS Spokane, Wash.

Application November 17, 1933, Serial No. 698,451

2 Claims.

My invention relates to printing press roll shifting means and certainobjects of the invention are to provide adjusting means whereby therolls of a printing press may be turned and set with respect to thedriving means so that; after first printing with one color, the printingof additional colors will conform and register with the colorspreviously printed. Further objects are to provide an adjusting meansthat is simple in construction, and easy and quick to operate, and whichwill give a very refined adjustment of the rolls. Still further objectsare to provide adjusting means that is of general application and whichmay be applied to printing presses in vari ous ways.

With the above and other objects in view which will appear as thedescription proceeds, the invention consists of the novel construction,adaptation, combination and arrangement of parts hereinafter describedand claimed. These objects are accomplished by devices illustrated inthe accompanying drawing; wherein:

Figure 1 is a view in side elevation of the device; Fig. 2 is a top planview of the same with parts broken away; Fig. 3 is a view in centrallongitudinal section of the gear shifting means; and Fig. 4 is a view incentral longitudinal section of the device for operating the gearshifting means.

Referring to the drawing throughout which like reference numeralsdesignate like parts, the numeral 5 indicates a portion of a printingpress frame whereon is journaled a horizontal drive shaft 6 on which isfixed a bevel gear 1. Said bevel gear meshes with another bevel gear,designated by the numeral 8, which is fixed on the lower end of avertical shaft 9, and on which shaft is fixed an additional pair ofspaced apart gears l0 and H. The gear drives another bevel gear |2 thatis integral with a wide helical gear l3 which is revolubly mounted on astub shaft fixed to the frame 5.

A narrow helical gear |4 meshes with the wide helical gear l3. Thehelical gear I4 is integral with a hollow hub l5, and another narrowhelical gear I5 is made an integral part of said hub outside of thenarrow gear H. The outer helical gear l6 meshes .with a wide helicalgear I! which is secured to a spur gear l8 by means of bolts l9 passingthrough slots 20 provided in the helical gear IT. A type or platecarrying roll 2| has its end axle 22 journaled through the frame 5, andthe spur gear I8 is keyed or otherwise fixed on said end axle. The spurgear |8 meshes with another spur gear 23 fixed on an end axle which isjournaled through the frame 5 and fixed to a press roll 24 which engagesthe type roll.2|. A paper 25, upon which the printing is done, passesbetween the rolls 2| and 24.

The gear shift or adjusting arrangement, shown in Fig. 3, embodying thenarrow inner and outer helical gears l4 and I8 respectively and forminga part of the hollow hub I5 is a very important feature of my invention.Said hollow hub is revolubly mounted on a sleeve 26 one end of which isfixed through the frame 5. A rod 21 extends slidably through said sleeveand the frame, and the end 20 of the hollow hub is journaled on saidrod. A thrust bearing 29 is mounted on said rod against the inside ofsaid hub end and two nuts 30 form a bearing for the outside of said hubend. In this arrangement it will be apparent that the hollow hub l5revolves both on the sleeve 28 and on the rod 21, and said rod may beturned and slidably moved back and 20 forth thus carrying the hollow hubwith it.

The detail means for turning and slidably moving the rod 21 is shown inFig. 4 wherein a hand wheel 3| is fixed on its end. The end portion ofsaid rod is threaded at 32 and said threaded 25 portion extends throughan internally threaded bearing member 33 which is fixed to the frame 5.Said bearing is split and a bolt 34 extends through the split portionwhereby same may be clamped tightly against the rod to retain some in astationary position as will be understood. It will be apparent that byturning the wheel 3|, the rod 21 may be slidably and revolubly movedback and forth as desired and the hub I5 together with its gears l4 andI6 will be moved back and forth with it.

When the hub I5 is moved back or forth its narrow gear II will beslidably moved along the face of the wide gear l3. Both of said gears,having helical teeth or teeth which slant with respect to their axes,the gear M will be turned, it being assumed that the gear l3 remainsstationary. This will turn the hub l5 and gear IS which gear will turnthe gear I! thus turning the type roll 2|,

and will also turn the roll 45 24 through the medium of the gears l8 and23. This arrangement provides a quick, easy and refined means foradjusting the rolls relative to each other and with respect to the driveshaft 6. Said rolls may thus be either set forward or backward byturning the handle 3|, and when they are set to the required positionthe bolt 34 is tightened thus retaining them in the desired position. Acoarse adjustment of the rolls may first be made by loosening the boltsl9 and turning the gear l1 whereby the slots 20 will slldably low hubhaving a pair of gears formedthereon move on said bolts which may thenbe tightened. in spaced apart relation, a rod slidably and revo- Mydevice is of practical use in setting type or lubly mounted through theframe, said hub revplate rolls tor the purpose o1 lining up andmatcholubly mounted on said rod and arranged to sliding coloredprintwork where one or more 001- ably move therewith, a threadedconnection beors have previously been printed and it is desired tweenthe rod and framameans for manually to print another color. It providesmeans revolving the rod, one of the gears on the holwhereby theadditional color is caused to print low hub having helical teeth meshingwith the at the correct place instead of being too far above teeth ofthe helical gear of the driving gear sysor below the correct place whichhas often been tem, the other gear meshing with one of the gears thecase. While I have descr b d the gears l6 inthe system or" driven gearsand said driven themselves may be varied as desired, it being unrolls isadiusted when the rod and hub is rederstood that my device is of generalapplication. volved.

For the purpose of brevity,in the claims the sys- 2. In a printing presshaving printing rolls tem of gears between the drive shaft 6 and themounted thereon, the combination with a system hub l5 will be termed thedriving gears, and the of driving gears one of which is provided withsystem of gears between said hub and the printhelical teeth, and asystem of driven gears aring rolls will be termed the driven gears.ranged to rotate the rolls, of adjusting means for 20 Having thusdescribed my invention, what I the rolls comprising a pair of integrallyconnected claim and desire to secure 'by Letters Patent is: gears, oneof said gears having helical teeth mesh- 1. In a printing presscomprismg a frame having with the gear having helical teeth in the ing apair of printing rolls mounted thereon, the driving gear system, theother gear meshing with combination with a system of driving gears oneone of the driven gears for rotating the rolls, and g of which is ahelical gear, and a system of driven one of said driven gears adjustablyconnected gears arranged to rotate the printing rolls, of with anotherdriven gear. adjusting means for the rolls comprising a hol- HARRY H.RAWSON.

